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P1404 Diagnostic Trouble Code Discussion for February 2008

EGR Position Sensor Rationality Closed

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Trouble Ticket Help Requests for DTC P1404
Help Request Posted
2000 Chevrolet Blazer LS 4.3L MIL Lamp on VIN: 1GNDT13W3Y
P1404: EGR Valve Closed Position Performance. This blazer keeps setting a P1404 code every couple of days. I replaced the EGR valve with a Delphi unit from NAPA but the code continues to set. The modis shows 0.75 volts KOEO and about 1.37 volts KOER. All other EGR positon data(desired, duty cycle, and %)a...
February 19, 2008